Surface hydrophobic modification of starch with bio-based epoxy resins to fabricate high-performance polylactide composite materials

2014 ◽  
Vol 94 ◽  
pp. 16-22 ◽  
Author(s):  
Zhu Xiong ◽  
Songqi Ma ◽  
Libo Fan ◽  
Zhaobin Tang ◽  
Ruoyu Zhang ◽  
...  
Keyword(s):  
Composite Materials ◽  
Epoxy Resins ◽  
High Performance ◽  
Hydrophobic Modification

Mineral/microfibrillated cellulose composite materials: High performance products, applications, and product forms

TAPPI Journal ◽  
2018 ◽  
Vol 17 (09) ◽  
pp. 507-515 ◽  
Author(s):  
David Skuse ◽  
Mark Windebank ◽  
Tafadzwa Motsi ◽  
Guillaume Tellier
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
Aqueous Suspension ◽  
Production Capacity ◽  
Cost Savings ◽  
Cost Effective ◽  
New Materials ◽  
Wet Strength ◽  
Product Forms ◽  
Cellulose Composite

When pulp and minerals are co-processed in aqueous suspension, the mineral acts as a grinding aid, facilitating the cost-effective production of fibrils. Furthermore, this processing allows the utilization of robust industrial milling equipment. There are 40000 dry metric tons of mineral/microfbrillated (MFC) cellulose composite production capacity in operation across three continents. These mineral/MFC products have been cleared by the FDA for use as a dry and wet strength agent in coated and uncoated food contact paper and paperboard applications. We have previously reported that use of these mineral/MFC composite materials in fiber-based applications allows generally improved wet and dry mechanical properties with concomitant opportunities for cost savings, property improvements, or grade developments and that the materials can be prepared using a range of fibers and minerals. Here, we: (1) report the development of new products that offer improved performance, (2) compare the performance of these new materials with that of a range of other nanocellulosic material types, (3) illustrate the performance of these new materials in reinforcement (paper and board) and viscosification applications, and (4) discuss product form requirements for different applications.

The Mechanical Properties of Organic Modified Epoxy Resin

2020 ◽  
Vol 43 (3) ◽  
pp. 10-14
Author(s):  
Georgel MIHU ◽  
Claudia Veronica UNGUREANU ◽  
Vasile BRIA ◽  
Marina BUNEA ◽  
Rodica CHIHAI PEȚU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Epoxy Resins ◽  
Mechanical Tests ◽  
Organic Modification ◽  
Three Point Bending ◽  
Modified Epoxy

Epoxy resins have been presenting a lot of scientific and technical interests and organic modified epoxy resins have recently receiving a great deal of attention. For obtaining the composite materials with good mechanical proprieties, a large variety of organic modification agents were used. For this study gluten and gelatin had been used as modifying agents thinking that their dispersion inside the polymer could increase the polymer biocompatibility. Equal amounts of the proteins were milled together and the obtained compound was used to form 1 to 5% weight ratios organic agents modified epoxy materials. To highlight the effect of these proteins in epoxy matrix mechanical tests as three-point bending and compression were performed.

Core Programs of High-Performance Composite Materials

1998 ◽  
Author(s):  
A. Crasto ◽  
D. Anderson ◽  
R. Esterline ◽  
K. Han ◽  
C. Hill
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
High Performance Composite

The Wood Composite Materials of Table Tennis Bat and Batting Techniques

2012 ◽  
Vol 583 ◽  
pp. 49-52
Author(s):  
Zhong Hai Wang ◽  
Ru Jian Yuan ◽  
Xiao Bing Fan
Keyword(s):  
Composite Materials ◽  
Material Science ◽  
High Performance ◽  
Technical Innovation ◽  
Wood Composite ◽  
Table Tennis ◽  
Tennis Racket

With the table tennis technical innovation and improvement of science, high-performance materials are used to manufacture of table tennis plate floor and help athletes have achieved better results. This article elaborated the wood composite materials’s impact on batting techniques through the analysis of the function of table tennis racket floor and its structure and capacity based on material science for provide the reference on manufacturing and selecting of table tennis racket.

scholarly journals Investigation of the properties of composite materials based on epoxy resins with microsilica additives

2021 ◽  
Vol 318 (3) ◽  
pp. 63-70
Author(s):  
M.A. Serekpayeva ◽  
◽  
G.А. Kokayeva ◽  
R.K. Niyazbekova ◽  
S. Kardybai ◽  
...  
Keyword(s):  
Composite Materials ◽  
Epoxy Resin ◽  
Corrosion Protection ◽  
Epoxy Resins ◽  
Machine Maintenance ◽  
Resistance Increase ◽  
Dispersed Filler ◽  
Filler Particles

The outcomes of studying epoxy-based composite materials supplemented with microsilica are provided in the article. Microsilica was used as a filler. The samples were produced on the epoxy ED-20 basis supplemented with 2, 5 and 10 mas. % of microsilica. The structure and size of finely dispersed filler particles were defined. The obtained composites were tested for resistance to the effect of variable temperatures, corrosive, and abrasion. The study outcomes proved that samples supplemented with 2% of microsilica are more resistant to acid and alkali as well as to petrol than those ones supplemented with 25% of microsilica. Besides the amount of the filler from 2 to 10% doesn’t sufficiently affect the resistance to variable temperatures. When microsilica is added to epoxy resin, it causes scuff resistance increase. The conducted testing proved that the developed composite materials are resistant to the effect of variable temperatures, corrosive, and abrasion. This enables to use these materials as coatings and anti-corrosion protection during machine maintenance.

scholarly journals CURRENT STATE OF APPLIENCE ZIRCONIUM DIOXIDE IN BIOENGINEERING

2020 ◽  
Vol 4 ◽  
pp. 39-42
Author(s):  
Oksana Morozova ◽  
Edwin Gevorkyan
Keyword(s):  
Fracture Toughness ◽  
Composite Materials ◽  
Zirconium Dioxide ◽  
High Performance ◽  
Current Knowledge ◽  
High Hardness ◽  
Color Stability ◽  
Orthopedic Implants ◽  
Advantages And Disadvantages ◽  
Alternative Material

This descriptive review presents current knowledge about the bioengineering use of a zirconium dioxide, the advantages and disadvantages of the material, and the prospects for research in this direction. The work reflects the success of the practical application of the zirconium dioxide as a material for dental structures and biological implants. Such practical characteristics, such as color-stability, chemical stability, good aesthetics, biocompatibility and durability, allowed to actively use the zirconium dioxide as a material for producing various dental structures. In comparison with other ceramics, the presence of high-performance of strength and fracture toughness of the zirconium dioxide enables the use of this material as an alternative material for the reconstructions in the readings with considerable loads. High hardness determines the zirconium dioxide as an excellent material for articular prostheses, because of its hardness, provides a low level of wear and excellent biocompatibility. However, along with positive characteristics, a widespread practical problem of using the zirconium dioxide in dentistry is a chip or fracture of veneering ceramics. It has also been reported that there is a shortage of orthopedic implants such as hydrothermal stability. The solution of such problems is indicated and the use of composite materials based on the zirconium dioxide, which allows to solve a similar problem, as well as to increase the service life and reliability of orthopedic implants by providing a higher fracture toughness and mechanical strength. The existence of such composite materials based on the zirconium dioxide provides a significant increase in the wear resistance of orthopedic implants, which is essential for successful prosthetics

BPA-Free High-Performance Sustainable Polycarbonates Derived from Non-Estrogenic Bio-Based Phenols

2021 ◽  
Author(s):  
Michael Garrison ◽  
Perrin Storch ◽  
William S. Eck ◽  
Valerie Adams ◽  
Patrick Fedick ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Epoxy Resins ◽  
High Performance ◽  
High Volume ◽  
Endocrine Disrupter

Bisphenol A (BPA) is a versatile petrochemical used in the preparation of high volume polymers including polycarbonates and epoxy resins. Unfortunately, BPA is also an endocrine disrupter and has been...

Polysaccharide nano crystal reinforced nanocomposites

2008 ◽  
Vol 86 (6) ◽  
pp. 484-494 ◽  
Author(s):  
Alain Dufresne
Keyword(s):  
Composite Materials ◽  
Physical Properties ◽  
High Performance ◽  
Volume Fraction ◽  
Thermal Stabilization ◽  
Nano Particles ◽  
Strong Interactions ◽  
Nano Composite ◽  
Practical Applications ◽  
Nano Crystal

There are numerous examples of animals or plants that synthesize extracellular high-performance skeletal biocomposites consisting of a matrix reinforced by nano sized crystalline domains. Cellulose and chitin are classical examples of these reinforcing elements, which occur as whisker-like microfibrils that are biosynthesized and deposited in a continuous fashion. In many cases, this mode of biogenesis leads to crystalline microfibrils that are almost defect-free, and whose axial physical properties therefore approach those of perfect crystals. During the last decade we have attempted to mimic biocomposites by blending cellulose or chitin whiskers from different sources with polymer matrices. Aqueous suspensions of such nano crystals can be prepared by acid hydrolysis of the substrate. The object of this treatment is to dissolve away regions of low lateral order so that the water-insoluble, highly crystalline residue may be converted into a stable suspensoid by subsequent vigorous mechanical shearing action. The resulting nano crystals occur as rod-like particles or whiskers, whose dimensions depend on the nature of the substrate. They are typically a few hundred nm long and between 5 and 20 nm in diameter. Starch can also be used as a source for the production of nano crystals. The constitutive nano crystals appear as platelet-like nano particles with a length ranging between 20 and 40 nm, a width ranging between 15 and 30 nm, and a thickness ranging between 5 and 7 nm. Since the first announcement of using cellulose whiskers as a reinforcing phase, they have been used extensively as model fillers in several kinds of polymeric matrices, including synthetic and natural ones. Casting mixtures of polysaccharide nano crystals and lattices led to the production of nano composite materials with drastically enhanced mechanical properties, especially at T > Tg of the matrix, by virtue of the formation of a whiskers network, even when the whisker volume fraction was only a few percent. The formation of this rigid network, resulting from strong interactions between whiskers, was assumed to be governed by a percolation mechanism. This hydrogen-bonded network induced a thermal stabilization of the composite up to 500 K, the temperature at which polysaccharides start to decompose. Any factors that perturb the formation of this percolating network directly affect the reinforcing effect of polysaccharide nano crystals. In addition to some practical applications, the study of these nano composite materials can help researchers understand such physical properties as the geometric and mechanical percolation effect.Key words: nano composites, polysaccharide, polymer, cellulose, nano crystal.

Sign in / Sign up

Export Citation Format

Share Document